Seraphine was surprised that Eric was able to see her discomfort straight away.
It must have shown with how she addressed him with more care and respect than what she always does. It's not that she's against doing that, though. If he tells her to, she will continue to talk to him that way. He deserves the honor and high regards that his noble title reserves for him, after all.
"Come, milady. Let's take this to the balcony," Eric said with a smile as he offered his arm for Seraphine to hold onto.
"O-Oh, alright, Your Highness."
She accepted the gesture with gratitude, finding him quite the perfect gentleman for doing so.